Season the chicken breast evenly on both sides with half of the sea salt, black pepper, and dried oregano.
Heat the avocado oil in a medium skillet over medium-high heat until shimmering.
Add the chicken to the skillet and cook for 5-7 minutes per side until golden brown and the internal temperature reaches 165°F.
While the chicken cooks, dice the cucumber and halve the cherry tomatoes.
In a small bowl, whisk together the extra virgin olive oil, lemon juice, and the remaining sea salt, black pepper, and oregano to create the dressing.
Once the chicken is cooked, let it rest for 5 minutes before slicing it into bite-sized strips.
In a large mixing bowl, combine the cooked quinoa, diced cucumber, cherry tomatoes, and fresh parsley.
Add the sliced chicken to the bowl and drizzle the lemon-herb dressing over the top.
Toss everything gently to combine and serve immediately.